It is better because it eliminates chaos. It replaces "I hope this works" with "I know this works." It turns the wild west of ROM collecting into a structured, audit-able, perfectly version-controlled digital library.
But if you are a hobbyist who wants the assurance that any arcade game released before 2015 will launch correctly, with correct sound, correct controls, and zero missing file errors, then the MAME Full Set is the only way to live. mame full set roms better
Because MAME is an archival tool, not a game launcher. It is better because it eliminates chaos